LOS ANGELES, Aug 1: Nasa scientists have said they have definitive proof that water exists on Mars after further tests on ice found on the planet in June by the Phoenix Mars Lander.

“We have water,” said William Boynton, lead scientist for the thermal and evolved-gas analyser instrument on Phoenix.

“We’ve seen evidence for this water ice before in observations by the Mars Odyssey orbiter and in disappearing chunks observed by Phoenix last month, but this is the first time Martian water has been touched and tasted,” he said on Thursday, referring to the craft’s instruments.

On Thursday Nasa also extended the mission of the Phoenix Mars Lander by five weeks, saying its work was moving beyond the search for water to exploring whether the red planet was ever capable of sustaining life.

“We are extending the mission through Sept 30,” Michael Meyer, chief scientist for Nasa’s Mars exploration programme, told a televised news conference.

The extension will add about $2 million to the $420 million cost of landing Phoenix on May 25 for what was a scheduled three-month mission, Meyer said.

Phoenix is the latest Nasa bid to discover whether water ever flowed on Mars and whether life exists or ever existed there.—Reuters